If the game crashes apparently you can loose all your save data since it was started. I'm not sure this game is worth going back and replaying the last 5 levels.
When you pause the game for long peroids of time there are adverse affects. One time I came back and a camera was going super fast. Another time the guy i knocked out before the pause insantly woke up and caught me.
 "Mighty Knight"){kind=icon}
 "Bob the Robber 2"){kind=icon}